Cutting device for twisting machines



Nov. 23 1926.

F. S. BOOTES CUTTING DEVICE FOR TWISTING MACHINES Filed June 17, 1926 2 Sheets-Sheet 1 dig-{We Nov. 23 ,-1926.

F. S. .BOOTES CUTTING DEVICE FOR TWISTING MACHINES Filed June 1'7, 1926 2 Sheets-Sheet 2 Patented Nov. 23, 1926.

STTES FORSIER BGGTES, 013 WORCESTER, MASSACHUSETT CUTTING DEVICE FOR Application filed June 17,

This invention relates to a device for preventing the continuation of the operation of an element of a twisting machine when there is only one strand of yarn being wound on a bobbin. It is well understood that the continuation of the turning of the bobbin when one of the strands breaks involves considerable loss and that it is desirable to stop the action entirely when that occurs. Many devices have been invented for this purpose but they have not worked with entire satisfaction.

The principal objects of this invention are to provide a reliable device operated by the release of one strand of yarn or thread, for cutting the other so as to avoid the loss of yarn which would be suffered by the continuation of the winding of the single thread; also to provide a construction in which each strand is provided with a weight which it holds up while it is running in the normal way, these two weights being entirely separate, and to provide means whereby when one of them, due to the slackening of the yarn by breakage or the like, drops it will move a knife into position to cut the other strand and thus stop the feeding of the yarn; also to provide a device in which the weights are easily and in fact, automatically. threaded to hold them up as stated above and in which they can be set up in position for being threaded by the simple action of an ordinary pivoted handle or the like.

The invention also involves other features of construction and operation as will appear.

Reference is to be had to the accompanying drawings in which-- 7 Fig. 1 is a side view of a twisting machine with a yarn cutting device constructed in accordance with this invention;

Fig. 2 is a plan of the same;

Fig. 8 is an end view of the same;

Fig. i is a rear end view, these four figures showing the parts in the position the assume when running normally;

Fig. 5 is a view similar to Fig. 1 on on la-rged scale showing the position of the parts when the thread is running and the cutting device is not set ready for action;

6 is a side view like Fig. 5 showing the operating weights by themselves and the means for swinging them upwardly;

Fig. 7 is a view similar to Fig. 5 showing these weights raised and ready forthreads;

Fig. 8 is a view similar to Fig. 6 showing twisted condition.

ENE"

T'XUISTING MACHINES.

1925. Serial No. 116,742.

the same parts in the position illustrated. in

Fig. 7

Fig. 9 is a similar view showing the position of the parts when running as in Fig. 1;. and

. Fig. 10 is a similar view showing the operation of cutting when one strand is released.

Although capable of other uses, this invention is illustrated herein as applied to a machine feeding yarn or thread from two bobbins 10 around a sand roll 11 and through a guide or pigtail 12, to a bobbin 13, which is rotated so as to twist thetwo strands together and wind it on the bobbin in its The parts are mounted on the frame 1 1- as usual;

This invention is not concerned with the leading of the threads or yarn from the sand roll to the guide 12 although it might be located in that position, but I have shown it located between the bobbins and the sand roll. It comprises a frame 16 on which there is'an upstanding guide 17 having a slanting slot 18 and a long guideeye 19 through which the two strands are threaded in an obvious and simple manner. This eye is shaped to keep the two strands apart. Pivoted on an axis near this guide 17 is a plate 20 having a curved upper end 21 over which the strands of yarn are adapted to pass ,in all positions of it. It is also provided with an opening 22 at the top across which the strands of yarn pass in going from the guide-eye 19 to the sand roll 11. The plate 20 is provided with a projection 2% located below the pivot and extending outwardly by which it is operated.

On a shaft 25 extending across the device and supported on the frame 16 thereis an arm :26 at right angles to the shaft and pro vided with a handle 27, constituting a weight by which the shaft is operated and fwhich holds it in its extreme position. While threading, this arm 26 is swung down to the position shown in Fig. 5 in which position it engages the projection 24 and therefore swings the plate 20 up into contact with the yarn. In this position the yarn will be guided over the curved upper edge 21 of this plate. l Vhen the arm 26 is swung over to engage the projection 23 it will hold the plate down, as in Fig. 1, resting on the top of the frame 16.

The shaft 25 is provided with a projection or cam 30. Just above this is a pivot pin K In 31 extending across the frame 16. On this pivot pin are pivotally mounted two levers 32, each having a threading hook 33 extending up from its extreme end. The levers and threading hooks are so proportioned that gravity will normally hold the hooks down in the position shown at the bottomin Fig. 10. But when the arm 26 is over in the position shownin Figs. and 6, the projection 30 engages both levers 32 and holds them up in the position shown in these two figures.

N ow to set the device, the arm 26 is turned upwardly from the position shown in Fig. 5 to that shown in Fig. 1. In passing from one position to the other, itgoes through the position shown in Figs. 7 and 8. As shown in the latter figures, it will be obvious that the projection 30 'aises the hooks 8 3 furthcr. This projects themthrough the open? ing 22 in the plate as indicated in Fig. 7. These two hooks are oppositely arranged and project downwardly just as near thecenter of the device as possible so that the two strands of yarn coming through the machine and located a short distance apart, on account of the fact that the two bobbins 10 are in staggered relation, will be in a position to engage under these hooks as they are raised. It will be seen further that these hooks are rounded OK at the top inwardly and toward each other to guide the strands in toward the center and then, when they move apart naturally, on account of the position of the bobbins above mentioned, catch them individually behind their points. Therefore, in the position shown in Fig. 7, the twostrands of yarn are located within the two ,hooksbut no further action takes place until the arm 26 is raised further. On being raised to the posit-ion shown in the first tour figures, the cam 30 is withdrawn from the levers 32 as shown in Fig. 9, and the hooks are supported by the two strands of yarn so as to hold these levers up as long as both strands are running properly.

Now in case of a break, as shown in Fig. 10, it is understood that one hook 33 has nothing to support it in its elevated position and it drops, leaving the other hook in itsrunning position as shown. The eil'ect of this is to swing one of these levers 32 on its axis and raise itsrear end. This result's in engaging one of a pair of opposite aligned project-ions 35 on apivoted knife support 36. This pivot is located on an extension of the frame 16. When either one of the levers 32 is raised inthis way at the rear, it will movethe knife back from its position of rest against its stop 38, to a position against the back of the guide plate 17 Here it comes into contact with both strands of yarn, it the break has occurred at the forward side of this guide, and cuts the one that is still running. This, of course, lets down the other hook 33 and the two remain in that position until the arm 26 is swung over back to the position shown in Fig. 5 which the attendant does as soon as pos sible. The yarn is then pieced and the two strands threaded through again. Then this unit of the twister can be started by swinging the handlelntck to the position shown in Fig. 1.

It will be seen that this furnishes a device for this purpose which is practically sure to work every time and which requires no delicate work on the par-tot the operator to set it because the hooks are self-threading. The operation thereafter is automatic in every way and there is no difference in the operation. no matter which strand breaks and it makes nodiflerence where it breaks.

Therefore this constitutes a very efficient and practical. means for sired objects. j

This device is. entirelyindependent of any other mechanical part of the machine, in so far as its actual operation is concerned. it is practically tool proof and requires no additional attention on the part of the operator. twisted when they can be cut individually.

procuring the de- Tt cuts the threads before they are This is important in caseswhere more than i 1 twotthreads are twisted together. his equally effective irrespective of the amount of the twist in either the single or folded thread. It is quite as etlective on course or fine threads and does not require any adjustinent. when changing from one to the other. The speed of the :tramc can be. drastically changed. without necessitating any attention to this cutting device. weights do not have to be balanced o1 changed in any way and no lubrication is necessary. i j

Although I have illustrated and described only a single form of the invention, I am aware of the fact that modifications 022: be made by any person skilled in the art without departing from the scope of the invention as expressed in the claims. There fore I do not wish to be limited to the details shown, but what I claim is: r

1. In a device of the character described, the combination with means for feeding a plurality of strands or yarn or thread to a bobbin tor twistingsuch strands together and winding the same, of a knite, and means normally connected with ech strand separately for actuating the knife to cut the separate strands bG'fOTG they are twisted when any one of the strands of yarn breaks.

2. In a device for feeding a. plurality of strands of yarn or thread to a bobbin and twisting such strands together and winding the same, the combination with a inovable knife for cutting said strands located in position to cut the several strands before twisting, of means normally supported by nd separately for moving said l; to, rd means being connected to actuate the knife when any one of them drops due to the breakage or slackening oi the yarn.

3. In a winding and twisting machine, the combination with supports for a plurality of bobbins, and means for directing the yarn therefrom to a bobbin and twisting the s nds together and winding them on the l r bobbin, ot a guide for the strands of yarn adapted to keep them separate from each other in the guide, a plurality of levers each having hook located in a position to cage a single one of said strands and be supported th reby, and means whereby when one o1" said hooks falls, all the strands of yarn will be cut.

4-. in a winding and twisting machine, the combin tion with a plurality of bobbins and means It directing the yarn therefrom and twisting the strands together, of a guide for the strands of yarn, a plurality of levers each havi a hook for receiving one of said strands or yarn, and be supported thereby, said levers constituting weights normally moving down by gravity when the strands ct yarn no longer hold them up, and means whereby when one of said weights falls, all the strands of yarn will be cut.

in a winding and twisting machine, the combination with supports for bobbins located at a distance apart, and a guide for the yarn adapted to keep the strands separated, of a pivoted plate over which the yarn passes from the guide also constituting a guide to control the level of the strands of yarn, said plate having two projections thereon on different sides of its pivot, and a pivoted arm for holding said plate up or down in accordance with the projection which it engages.

o. in a winding and twisting machine,

the combination with a support for two bobbins locat d at a distance apart, a guide for the yarn adapted to keep the strands separated, pivoted plate over which the yarn pa s: ilOlD the guide also constitutinga g1 re to control the level of the two strands of yarn, said plate having two projections thereon on different sides of its pivot, and a pivoted arm for holding said plate up or down in accordance with the projection which it engages, of a cutter, and means extending through said plate and hanging on the different strands of yarn for operating the cutter when one of the strands breaks.

2'. In a winning and twisting machine, the combination with a support tor two bobbins located at a distance apart, a yarn guide adapted to keep the strands separated, a pivoted plate over which the yarn passes from the guide also constituting a guide to control the level of the two strands of yarn, said plate having two projections thereon on differentsides of its pivot, and a pivoted arm for holding said plate up or down in accordance with the pro ection wlnch it engages, said plate having an opening theretnrough,

01 a pair of levers pivoted below the plate and having hooks projecting therefrom and adapted to pass upwardly through said opening, said arm having means for moving said hooks upwardly to project them through the opening while the arm is moving through an are between one projection and the other to lower the plate so that said hooks will come into contact with the strands of yarn and when the arm is brought over to extreme position it will not support the hooks and levers but will leave them supported by the strands of yarn alone.

8. In a winding and twisting machine, the combination with a support for two bobbins located at a distance apart, a yarn guide adapted to keep the strands separated, a plate over which the yarn passes from the guide, and a pivoted arm, said plate having an opening therethrough, ot' a pair of levers pivoted below the plate and having hooks projecting therefrom and adapted to pass upwardly through said opening, said arm having means for moving said hooks upwardly to project them through the opening so that said hooks will come into contact with the strands of yarn and when the arm is brought over to extreme position it will not support the hooks and levers but will leave them supported by the strands of yarn alone.

9. In a device of the character described, the combination of a plate having an opening therethrough, a shaft under the plate having an arm project-ing at an angle therefrom, a pair of levers pivotally mounted and each having a hook projecting upwardly from one end and so balanced that they will normally stay in depressed position, said shaft having a cam thereon for engaging said levers and forcing them up to project the hooks through the opening, whereby when the yarn is running over said plate, the moving of said arm upwardly will swing the hooks up through the opening'and thread them and then leave them hanging on the yarn without any other support, and a pivoted knife for cutting the yarn having projections in position to be forced by either of said arms into cutting position when one of said arms drops.

10. In a device of thecharacter described, the combination of a pivoted plate having a projection on each side of the pivot, a shatt under the plate having an arm projecting at an angle therefrom and adapted to engage either, of said projections and hold the plate up or down, said plate having an opening therethrough, a pair of levers pivotally mounted and each having a hook projecting upwardly from one end and so balanced that they will normally stay in position with the hooks down to their lowest limit, said shatthaving a cam thereon for engaging said lerality of spools or bobbins and a support for a bobbin arranged to rotate to receive and twist the strands from the first named bobbins or spoo1s,ot' zi cutter arranged between the first named spoolsior bobbins and the rest of the machine, and means, actn'ated by the release of tension due to the breakage of any of said strands, for "actuating said cutter to sever all the strands before they pass into the machine.

In testimony whereof I have hereunto atfixed my signature.

F. S, ROUTES. 

